Diaphragm-valve.



M. MINTZ.

DIAPHRAGM VALVE.

APPLICATION FILED Dm. 2, 190s.

Patented Aug. 13, 1912.

` MIKE MINTZ, OF ROCK ISLAND, ILLINOIS.

DmrHmiGM-vALvn.

Specification of Letters Patent.

Patented Aug. 13,1912.

Application illed December 2, 1908. Serial No. 465,628.

To all whom t may concern:

Be it known that I, MIKE MINTZ, a citizen of the United States ofAmerica, and resident of Rock Island,Rock Island county, Illinois, haveinvented a certain new and useful Improvement in Diaphragm-Valves, of'which the following is a speci cation.

My invention relates to improvements in diaphragm valves, and isespecially applicable for use in connection with air compressors, andhas for its object, the production of a device by meansof which thepressure of air under the diaphragm may be restored to atmospheric. Y

l A further object is the provision of means whereby the air passingthrough the'device,

y may be cleaned and purified.

A lfurther object is the production of a simple and eicient device offew parts, that can be cheaply constructed and one t-hat is not liableto get out of order.

These and such other objects asmay hereinafter appear, are attained bymy device,

an embodiment of which is shown in the accompanying drawing.

Figure 1, represents a sectional half of myv device. Fig. 2 represents asectional view on thev line 2-2 of Fig. 1 looking in,

the direction indicated by the arrows, a portion of the device beingbroken away.

Like numerals of reference indicate like parts in the several figures ofthe drawing.

Referring nowto the drawings; the diaphragm shell comprises an uppercasing 3 .and a lower casing 4, between which is secured a diaphragm 5.These casings are provided with bearing flanges 6-7 circular washers 8are provided between the diaphragm and the flanges and a circumferentialflange 9 extends downwardly from the outside of the flange 6, serving tomake a more perfect joint between the casings. Screw bolts 10 passthrough the bearing Hanges and the diaphragm, holding the casingssecurely together. The lower casing terminates in a hollow boss or stem4a and threaded passages 11 communicate with the passage 12 in the bossin which are 'screwed the` pipes or tiibes 13, from the compressed airpump.` The upper casing is also pro vided with a hollow boss or stem 14,within whicha threaded nipple 15 screws. This nipple is hollow `and thepassage 16 therein, communicates with the compressed air tank.

Referring now to the -interior of the diaphragm casing, a hollow valvepost 17 is screwed into the hollow 'boss 4n and the passage 18 thereincommunicating with the passage 12, and also through an opening 19, withthe lower diaphragm chamber 20. Seated in the diaphragm chamber are apair of disks 21-22 of different diameters, thus leaving a space withinthe disks which is filled with some absorbent material 23. These disksare provided with a plurality of openings 24, and are so fitted intoplace that the openings in the two disks are in staggered relation toeach other. These disks are provided with cent-ral openings, permittingthe valve post 17 to extend upward into the middle diaphragm chamber 25.A valve-seat support 26 is mounted on the top of the post in which islocated a valve-seat 27. The diaphragm 5 is also provided w-ith a centraopening, permitting the passage of the tube or valve 28. A shoulder 29rests on the top of the diaphragm and this tube is mounted to slidewithin the passage 16, being fitted loosely therein, and a slightclearance being provided between the tube and the nipple 15,

thus providing a passage for the air between The spring 30 therefore isprimarily of use.

to temporarily close the valve. It will be understood, of course, thatthe diaphragm 5 being made of spring-like material the spring 30 can beeliminated entirely from my mechanism, the excess pressure in the upperchamber of the diaphragm holdin the valve 28 in place against the seatl2g after the valve 28 is closed.

In order to permit the pressure below the diaphragm to Ireturn to thatof the atmosphere, when the valve 28 is closed, I provide a small portor valve 31 opening into the air, and in order to draw off any oil thatmay work up into the diaphragm, I provide a small valve 32 communicatingwith the lowest part of the lower diaphragm chamber. Of course, the port3l and the valve 32 might be combined and one small drain tube serve tocarry off the oil and compressed air, but I consider' the structure asshown much better and more satisfactory.

It will be seen that I have provided a valve in which the atmosphericpressure may and also one in which the air forced through the valve iscleansed and purified.

It is a fact that the oil and other impurities are often carried insuspension with the air, when it is forced into the tank. This is anespecially objectionable feature when the air is used in dentistry or inthe aeration of or for forcing the flow of bev--V erages. By the use ofthe absorbent padV or filling, the air may be cleansed and puri-V fiedand if desired the pad may be medicated or saturated with perfume, thusimparting a pleasant odor or flavor to the air. This feature is anespecially valuable one in the case of the use of air for the treatmentJof disease.

The port 31 is preferably made by first drilling a hole nearly throughthe shell and then withdrawing the drill and driving a needle-pointedinstrument through the shell at the point where the drill-hole comes toa tapering point. This forms a port so small that itis invisible fromthe outside, but sufficiently large to permit the escape of air from thelower chamber.

veloped even against this small seepage.v I

have thus devised a means of relieving the pressure from the under sideof the diaphra It is evident that many modifications may be made thatwill accomplish these results, but all such as contemplate the speedyreturn to atmospheric pressure on the underV side of the diaphragm, orthe purifying of the air between the pump and the tank ory vacuumchamber, come within the spirit of my invention.

Vliiley I have illustrated my invention in connection with an aircompressor, it will be understood that the various features of myinvention arelikewise adapted for use, with minor changes, as a vacuumpump, and I therefore do not wish to limit myself to any one specificuse.

' I claim:

1. In a device of the class described, the combination with a diaphragmcasing, a diaphragm dividing the interior of said casing into an upperand lower chamber, a valve communicating with the lower chamber, and.means for restoring the pressure within said chamber to atmosphericwhen said valve is closed. p

2. In a device of the class described, `the combination with a diaphragmcasing, a

diaphragm dividing the interior of said cas` ing into an upper. andlower chamber, a valve communicating with the lower chamber, and means.forl restoring the pressure,

The area of this port is so small in comparison to the area ofl Loaaeoewithin said chamber to atmospheric when said valve is closed, togetherwith means for 'withdrawing impurities from the air passing through saidchamber. v

3. In a device of the class described, the

combination with a diaphragm casing, ar

diaphragm dividing the interior of said casing into an upper and lowerchamber, a valve communicating with the lower chamber, and means forrestoring the pressure within said chamber to atmospheric when saidvalve is closed, together withmcans for withdrawing impurities from theair passing through said chamber, said means comprising a layer ofabsorbent material located between the inlet and the outlet.

4. In a device of the class described, the combination with a diaphragmcasing', Aa diaphragm dividing the interior of said casing into an upperandl a lower chamber, a

valve communicating with the lower cham-- ber, and means for restoringthe pressure within said chamber to atmospheric, when said valve isclosed, together with means for withdrawing impurities from the airpassing through said chamber, said means compris- .ing a pair ofperforated disks spaced apart [said valve'is closed, together with meansfor withdrawing impurities from the air passing through said chamber,said means comprising a pair of perforated disks, spaced apart andfitting within saidv lower chamber, the space within said disks beingfilled with absorbent material, and perforations in said disks beingplaced in staggered relation to each other.

6. In a device of the class described, the combination with a diaphragmcasing, a diaphragm dividing the interior of said cas ing into an upperand lower chamber, a spring controlled valve communicating with thelower chamber, and means for restoring the pressure within said chamberto atmospheric, when said valve is closed.

7. In a device of the class described, the combination with a diaphragmcasing, a diaphragm dividing the interior of said casing into an-.upperand lower chamber, a spring controlled valve communicating with thelower chamber, and means for restoring the pressure within said chamberto atmospheric, when said valve is closed, together with means forwithdrawing impurities from the air passing through said chamber.

8. In a device of the class described, the

combination with a diaphragm casing, a diaphragm dividing the interiorof said casing into an upper and lower chamber, a spring controlledvalve communicating with the lower chamber, and means for restoring thepressure within said chamber to atmospheric, when said valve is closed,together with means -for withdrawing impurities from the air passingthrough said chamber, said means comprising a layer of absorbentmaterial located between the inlet and the outlet.

9. In a device of the class described, the combination with a diaphragmcasing, a diaphragm dividing the interior of said casing into an upperand lower chamber, a spring controlled valve communicating with thelower chamber and means for restoring the pressure within said chamberto atmospheric, when said valve is closed, together with means forwithdrawing impurities from the air passing through said chamber.

said means comprising a pair of perforatedY disks spaced apart andfitting within said lower chamber, the space between said disks beingfilled with absorbent material.

10. In a device of the class described, the combination with a diaphragmcasing, a diaphragm dividing the interior of said casing into an upperand lower chamber, a spring controlled valve communicating with thelower chamber, and means for restoring the pressure within said chamberto atmos pheric, when said valve is closed, together with means forwithdrawing impurities from the air passing through said chamber, saidmeans comprising a pair of perforated disks spaced apart and fittingwithin said lower chamber, the space within said disks being filled withabsorbent material, and

perforations in said disks being placed in staggered relation to eachother.

11. In a device of the class described, the combination with a diaphragmcasing, a diaphragm dividing the interior of said casing into an innerand lower chamber. a valve communicating with the lower chamber, andmeans for restoring the pressure within said chamber to atmospheric whensaid valve is closed, said means comprising a needle-point port fromsaid lower chamber to the atmosphere.

12. In a device of the class described, the combination with a diaphragmcasing, a diaphragm dividing the interior of said casing into an upperand lower chamber, a valve communicating with the lower chamber, andmeans for restoring the pressure within said chamber to atmospheric whensaid valve is closed, said means comprising a port extending from theinterior of said lower chamber and communicating with the atmospherethrough a needle-point opening.

13. In a device of the class described, the combination with a diaphragmcasing, a diahragm dividing the interior of said casing into an upperand lower chamber, a valve communicating with the lowerchamber, andmeans for restoring the pressure within said chamber to atmospheric whensaid valve is closed, said means comprising a port in said lowerchamber, a spring for temporarily seating said valve and closingcommunication between said chambers.

14. In a device of the class described, the combination with a diaphragmcasing, a diaphragm dividing the interior of said casing into an upperand lower chamber, a valve communicating with the lower chamber, andmeans for restoring the pressure within said chamber to atmospheric whensaid valve is closed, said means comprising aport in said lower chamber,a spring for temporarily seating said valve and closing communicaionbetween said chambers, the excess of tressure in said upper chamberrelieving the tension on said spring and holdinglsaid valve in closedposition.

15. In a device of the class described, the combination with a diaphragmcasing, a diaphragm dividing the interior of said casing into an upperand lower chamber, a valve communicating with the lower chamber, andmeans for restoring the pressure within said chamber to atmospheric whensaid valve is closed, and for carrying off any accumulated oil withinsaid chamber` said means comprising a port extending from the interiorof said lower chamber and communicating with the atmospherethrough aneedle-point opening.

16. In a device of the class described, the vcombination with adiaphragm casing, a diaphragm dividing the interior of said casing intoan upper and lower chamber, a valve communicating with the lowerchamber. and means for restoring the ressure within ,said chamber toatmospheric when said valve is closed, and for carrying off anyaccumulated oil within said chamber, said means comprising a port insaid lower chamber, a spring for temporarily seating said valve andclosing communication between said chambers.

17. In a device of theclass described, the

combination with a diaphragm casing, 'a diaphragm dividing the interiorof said casing into an upper and lower chamber, a valve communicatingwith the lower chamber, and means for restoring the pressure within saidchamber to atmospheric when said valve is closed, and` for carrying olfany accumulated oil within said chamber, said means comprising a port insaid lower chamber, a spring for temporarily seating said valve andclosing communication between said chambers, the excess of pressure 18.In a device of the class described, the combination vwith a diaphragmcasing, a

, 'diaphragm dividing the interior of said casing into an upper andlower chamber, aV

spring controlled valve communicating with the lower chamber, and meansfor restoring the pressure within said chamber to atmospheric, when'saidvalve is closed, together with means for withdrawing impurities from theair passing through said chamber,

said means comprlsmg a pair of perforated' combination with a diaphragmeasing, a

casing intr .spring con diaphragm dividing the interior of said an upperand lower chamber, a rolled valve communicating with the lower-chamberand means for restoring the pressure within said chamber to atmospheric,when said valve is closed, and for' withdrawing accumulated oil fromsaid lower chamber', together with means for withdrawing impurities fromthe air passing through saidy chamber, said means comprising a pair ofperforated disks spaced apart and -itting within said lower chamber, thespace between said disks being lled with absorbent material.

20. In a device of the class described, the combination with -adiaphragm casing, a diaphragm dividing the interior of said casing intoan upper and lower chamber, a valve communicating with the lowerchamber` and means for restoring the pressure within one of saidchambers to atmospheric when said valve is closed. i 1

21. In a device of the class described, the combination with a diaphragmcasing, a diaphragm dividing the interior of said casing into an upperand lower chamber, a valve communicating with -the lower chamber, andmeans for restoring the pressure withinl one of said chambers toatmospheric when said valve is closed, together with means forwithdrawing impurities from the `air passing through said chamber.,

communication between said chambers, andmeans for restoring atmosphericpressure within 'one of said chambers, when said valve is closed, saidmeans comprising a port from the interior of said chamber to atmosphere.

23. In a device of the class described, the

combination with a diaphragm casing, a diaphragm dividing the interiorof said casing 'into two separate chambers, valve communication betweensaid chambers, and means for restoring atmospheric pressure within oneof said chambers, when said valve is closed.

24. In a ,device of the class described, the combination with adiaphragm casing, a diaphragm dividing the interior of said casing intoan upper and lower chamber, a valve communicating with the lowerchamber, and means for restoring' atmospheric pressure within saidchamber, when said valve is closed, and for carrying oif any accumulatedoil within said chamber, said means comprising a port in said lowerchamber.

25. In a device of the class described, the combination with a diaphragmcasing,'a diaphragm dividing the interior of said casing into twoseparate chambers, valve communication between said chambers, and means`for restoring atmospheric pressure within ene of said chambers when saidvalve is closed, and for withdrawing accumulated oil and otherimpurities from said chamber.

26. In a device of the class described, the combination with a diaphragmcasing, a diaphragm dividing the interior of said vcasing into two'separate chambers, valve communication between said chambers, and meansfor restoring atmospheric pressure wit-hin one of said chambers, whensaid valve is closed, and for carrying oi oil and other impurities fromsaid chamber, said means comprising a port in said chamber.

27. Inla device of the classdescribed, the combination with a diaphragmcasing, a diaphragm dividing the interior of said casing withdrawingimpurities from the air passing therethrough.

29. In a device of the class described, the combination with a diaphragmcasing, a diaphragm dividing the interior of said casing into twoseparate chambers, a valve communicating with one of said chambers, andmeans for restoring atmospheric pressure within one of said chambers,when said valve is closed, said` means comprising a port from theinterior of said chamber to atmos here.

30. In a device of ,the class described, the

combination with a diaphragm casing, a diaphragm dividing the interiorof said caslng into two separate chambers, a valve communicating withone of said chambers, and means for restoring atmospheric pressurewithin one of said chambers, when said valve `is closed.

3l. In a device of the class described, the combination with a diaphragmcasing, a diaphragm dividing the interior of ,said casing into twoseparate chambers, a valve communicating with one of said chambers, andmeans for restoring atmospheric pressure within one of said chamberswhen said valve is closed, and for withdrawing accumulated oil and otherimpurities from said chamber.

32. In a device of the class described, the combination with a diaphragmcasing, a diaphragm dividing the interior of said casing into twoseparate chambers, a valve communicating with one of said chambers,

and means for restoring atmospheric pressure within one of saidchambers, when said valve is closed, and for carrying off oil and otherimpurities from said chamber, said means comprising a port in saidchamber.

33. In a device of the class described, the combination with a diaphragmcasing, a diaphragm dividing the interior of said casing intot-woseparate chambers, a valve communicating with one of said chambers, and

means for restoring atmospheric pressure within one of said chambers,when said valve is closed, together with means for withdrawingimpurlties from the air passing therethrough.

Signed by me at Chicago, Illinois, this 30th day of October 1908.

MIKE MINTZ.

Witnesses:

J. Nomar, CLARENCE E. TAYLOR.

